Telegraph-sounder.



UNITED STATES PATENT OFFICE.

JOHN ALBERT ALBERTSON,'O F LANSFORD, PENNSYLVANIA.

TELEGRAPH -SOUNDER.

SPECIFICATION formingpart of Letters Patent No. 699,056, dated April 29, 1902. Application filed June 20, 1901. Serial No. 65,265- (No model.)

To all whom, it neat] concern:

Be it known that I, JOHN ALBERT ALBERT- SON, a citizen of the United States, and a resident of Lansford, in the county of Carbon and State of Pennsylvania, haveinvented new and useful Improvements in.'Ielegraph-.

Sounders, of which the following is a full,

clear, and exact description.

This invention has for its object an-iinprovement in sounders used in the art of telegraphy, and provides a means whereby a. receiving stroke of the sounder may be heard' and readily recognized by being more promi' Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

.Figure' 1 illustrates my invention in one form as applied to a sounding instrument. Fig. 2 is a sectional view of myinvention indicated in Fig. 1, andFigs. 3, .4, and 5 illus trate modificationsot the invention.

On the base A is-supported by the frame B a well known form of sounder having an electromagnet O and a'vibrating arm D, supported in proximity to said electromagnet on an upright E by means of adjustable pivots F. Also on the frame is a contact-support G, carrying a screw-threaded rod H, upon which are arranged thumb-nuts I J, whereby the tension of thespring IQ-connecting the threaded rod H with the arm L of the vibrator D, may be adjusted. Mounted on the support G is the sounder M, in-the upper member of which is an adjustable limiting point or screw N. In the example ofmyimprovementshown in Figs. land 2 I apply to the lower end of the adjustable limiting-point a cushion made of suitable material-such, for instance,as soft rubber,felt,orthe likewhich is designed to receive the impact of the back stroke of thevibrating arm, whereby there will be but a faint or practically no sound or click, as

desired, and thus it will be seen that the ,sound produced for signaling or for receiving a message will be readily recognized, this re ceiving sound being made by the impact of the limiting-pdint Q, carried by the arm and which .may be adjusted as desired.

In the example of my improvemeu t shown in Fig. 3 the impact-receiving cushion consists of a coiled spring P, attached to the limitingpoint N, and in Fig. 4 the cushion consists of a sleeve 0, of yieldingmaterial, passing through the upper member of the sounder M, and in this sleeve. the limiting-point N engages. Obviously in this construction when the arm D strikes the lower end of the limiting-point N the shock will be broken and the sound materially decreased by an upward movement of the limiting-pointpermittcd by the sleeve-like cushion In Fig. 5 the cushion 0' consists of a length of material such as soft rubber, felt, or the like-inserted in a longitudinal recess formed in the limiting-point and of course projecting beyond the end of the same to be engaged by the arm D upon its return movement.

WVhen an impulse passes through the electromagnet, said electromagnet draws the armature R toward it and causes the vibratory arm Dto strike thelimiting-pointQagainstthe sounder M, and thus the impulse is sounded, and when the current'is broken the spring K throws the vibratory arm against the cushion limiting device 0, thus producing a faint or practically no sound. These cushion devices may be used on all sound-telegraph instruments, not only so-called sounders, buton relays or other instruments that may be employed instead of the sounder shown in the drawings.

Having thus described my invention, I claim as new and desire to secure by'Letters Patent-- 1. In a telegraph instrument, the coinbinafor the arm supported in said sleeve, substan- 10 tion of a vibratory arm, a sounding-point lotially as specified.

cated on said arm, a sounder, and a spring- In testimony whereof I have signed my yielding back-stroke-li1niting point on said name to this specification in the presence of 5 sounder, substantially as specified. t-wo subscribing Witnesses.

2. In a telegraph instrument, a sounder, a JOHN ALBERT ALBERTSON. vibratory arm carrying a sounding-point, a \Vitnesses: sleeve of yielding material arranged in an EUGENE M. BARNES,

FRANK E. RAGEN.

openingin said sounder, and a backstop point 

